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[In vitro studies on antioxidant and antimicrobial activities of polysaccharide from Lycoris aurea]
Qiao-Mei Ru1, Zhen-Ming Pei, Hai-Lei Zheng
1School of Life Sciences, Xiamen University, Xiamen 361005, China. ruqiaomei@xmu.edu.cn
Objective:
To study the preliminary antioxidant and antimicrobial activities of polysaccharide extracted from Lycoris aurea.
Methods:
The scavenging activities of the polysaccharide in vitro on superoxide radical (O2-*), hydroxyl radical (*OH), alkyl radical (R*) and hydrogen peroxide (H2O2) were investigated by modified chemical systems. Meanwhile, the antimicrobial activities were tested using paper-discagar diffusion method.
Results:
In general, the antioxidant activities of the polysaccharide were lower compared with Vc. However, the scavenging effects to *OH and H2O2 were parallel to Vc. Meanwhile, polysaccharide from Lycoris aurea had strong antimicrobial activities against Micrococcus luteus, Bacillus pumilus and Staphylococcus aureus.
Conclusion:
The polysaccharide extracted from L. aurea can scavenge *OH and H2O2 effectively and inhibit Gram-positive bacterias.
